2810020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1289}}^1$

素因数の和:1407

約数の個数: 24

約数和(自身を含む): 5959800

約数和(自身を除く): 3149780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 1289, 2180, 2578, 5156, 6445, 12890, 25780, 140501, 281002, 562004, 702505, 1405010, 2810020]

約数ペア:

[(1, 2810020), (2, 1405010), (4, 702505), (5, 562004), (10, 281002), (20, 140501), (109, 25780), (218, 12890), (436, 6445), (545, 5156), (1090, 2578), (1289, 2180)]